/**
 * FileName: JWTInterceptor
 * Author:   P
 * Date:     2020/9/22 22:36
 * Description:
 */
package com.hospital.nurse.interceptor;

import com.auth0.jwt.exceptions.AlgorithmMismatchException;
import com.auth0.jwt.exceptions.SignatureVerificationException;
import com.auth0.jwt.exceptions.TokenExpiredException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.hospital.nurse.utils.JWTUtils;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class JWTInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws IOException {
        Map<String, Object> map = new HashMap<>();
        //获取请求头里的token
        String token = request.getHeader("token");
        System.out.println("token = "+token);
        try {
            JWTUtils.verify(token);//验证令牌
            return  true;
        }catch (SignatureVerificationException e){
            e.printStackTrace();
            map.put("msg","签名无效");
        }catch (TokenExpiredException e){
            e.printStackTrace();
            map.put("msg","token过期");
        }catch (AlgorithmMismatchException e){
            e.printStackTrace();
            map.put("msg","token算法不一致");
        }catch (Exception e){
            e.printStackTrace();
            map.put("msg","token无效");
        }
        map.put("status",1);//设置状态
        String json =new ObjectMapper().writeValueAsString(map);
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().println(json);
        return false;
    }
}
